26891579039478 has 16 divisors (see below), whose sum is σ = 53802022777536. Its totient is φ = 8960715563400.

The previous prime is 26891579039471. The next prime is 26891579039497. The reversal of 26891579039478 is 87493097519862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891579039471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786010576 + ... + 786044787.

It is an arithmetic number, because the mean of its divisors is an integer number (3362626423596).

It is a 1-persistent number, because it is pandigital, but 2⋅26891579039478 = 53783158078956 is not.

Almost surely, 2^{26891579039478} is an apocalyptic number.

26891579039478 is an abundant number, since it is smaller than the sum of its proper divisors (26910443738058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26891579039478 is a wasteful number, since it uses less digits than its factorization.

26891579039478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572058219.

The product of its (nonzero) digits is 1646023680, while the sum is 78.

The spelling of 26891579039478 in words is "twenty-six trillion, eight hundred ninety-one billion, five hundred seventy-nine million, thirty-nine thousand, four hundred seventy-eight".